I tried to install windows service pack 2 on my computer. When everything was downloaded and then it restarted my computer. when the computer was restarting windows it froze up and would not continue to the desk top. I turned the computer off and started it back up again and it did the same thing. I had to reformat my computer so i could even use it. Does anyone know what is going on. And how should I install windows service pack 2.